Fuses & Circuit Breakers

Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

Fuses

Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

Circuit breakers

Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

Circuit Breakers
Circuit Breakers
Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuses
Fuses
Fuses - PCB
Fuses - PCB

46580 Products showing for Fuses & Circuit Breakers

74 / 999+
Better World
Schneider Electric Acti 9 3 Phase Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 776-2730
  • Mfr. Part No. A9XPH324
Each
MYR504.56
SIBA 500mA T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3286
  • Mfr. Part No. 70-007-65/0.5A
Each (In a Pack of 10)
MYR1.772
Legrand 2A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 180-6114
  • Mfr. Part No. 0 133 02
Each (In a Box of 10)
MYR13.271
Wickmann Inline Fuse Holder
  • RS Stock No. 174-0667
  • Mfr. Part No. 01550120ZXU
Each (In a Pack of 5)
MYR4.502
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 63A Curve D, 100 → 133V AC, 72V DC, 15 kA Breaking Capacity
  • RS Stock No. 791-3495
  • Mfr. Part No. A9F55163
Each
MYR244.56
Better World
Schneider Electric Multi 9 C60SP MCB, 2P, 16A Curve D, 440V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 211-2396
  • Mfr. Part No. M9F23216
Each
MYR309.17
ABB DDA200 RCD, 40A, 3 Pole, 300mA
  • RS Stock No. 225-6078
  • Mfr. Part No. 2CSB203101R3400 DDA203 A-40/0.3
Each
MYR784.45
Hager 72 Way Plastic Consumer Unit, IP30 FD
  • RS Stock No. 144-4611
  • Mfr. Part No. FD32AN
Each
MYR2,151.11
ABB S204L MCB, 4P, 20A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 201-397
  • Mfr. Part No. 2CDS244701R0204
Each
MYR1,087.82
Eaton, xEnergy MCCB 1P 250A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 537-5551
  • Mfr. Part No. 259094 NZMN2-A250
Each
MYR3,919.18
Siemens 63A NH Fuse, NH00, 500V ac
  • RS Stock No. 396-089
  • Mfr. Part No. 3NA3822-7
Each (In a Pack of 3)
MYR37.77
ABB S800S MCB, 2P, 25A Curve C, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-682
  • Mfr. Part No. 2CCS862001R0254
Each
MYR985.41
Schurter 10A PCB Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 384-106
  • Mfr. Part No. 3101.0055
Each (In a Pack of 5)
MYR15.248
Better World
ABB, XT3N MCCB 4P 160A, Fixed Mount
  • RS Stock No. 236-6657
  • Mfr. Part No. 1SDA068262R1 XT3N 250 TMG 160A FF
Each
MYR6,388.87
Phoenix Contact Surge Protector, 20kA, DIN Rail Mount
  • RS Stock No. 207-2724
  • Mfr. Part No. 2906738
Each
MYR762.01
ABB S302 MCB, 2P, 6A Curve C, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 200-903
  • Mfr. Part No. 2CDS382001R0064
Each
MYR474.60
nVent SCHROFF Earthing Kit
  • RS Stock No. 487-678
  • Mfr. Part No. 21102-001
Each
MYR31.28
Better World
Siemens Sentron 5SY6 MCB, 3P, 32A Curve C, 400V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 489-6473
  • Mfr. Part No. 5SY6332-7
Each
MYR493.29
Siemens 300A NH Fuse, NH2, 500V ac
  • RS Stock No. 395-553
  • Mfr. Part No. 3NA3250
Each (In a Pack of 3)
MYR133.31
ABB 63A Centred Tag Fuse, NH000, 500V
  • RS Stock No. 779-9971
  • Mfr. Part No. OFAF000H63 1SCA022627R1390
Each
MYR33.05
1
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